An exophytic cortically based sizable mass lesion measuring 7.6 x 7.6 x 8.5 cm, showing peripheral enhancement and large central non-enhancing (necrotic?) area is seen arising from the mid pole of the left kidney. The mass is highly vascular with hypertrophied left renal artery. Large draining veins are noted in the left perirenal space. No evidence of left renal vein invasion. Bilateral renal veins and IVC are patent. No focal mass lesion is seen in the right kidney. No evidence of local invasion of adjacent organs or significant abdominal lymphadenopathy is noted. Mild degenerative changes are seen in the visualized skeleton. A small well-defined sclerotic focus is seen in the 1st lumbar vertebral body, which is likely a bone island. No suspicious osseous lesion is seen in the visualized skeleton.